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Finding the Fourth Proportional to 611,792.40, 917,688.60 and 454,328.40

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Solution

The fourth proportional to 611,792.40, 917,688.60 and 454,328.40 is: 681,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,792.40 : 917,688.60 = 454,328.40 : x
  2. Step 2: Convert to fraction form
    611,792.40/917,688.60 = 454,328.40/x
  3. Step 3: Cross multiply
    611,792.40x = 917,688.60 × 454,328.40
  4. Step 4: Simplify right side
    611,792.40x = 416,931,993,336.24
  5. Step 5: Solve for x
    x = 416,931,993,336.24/611,792.40
  6. Step 6: Final answer
    x = 681,492.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.